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  • 取汉字拼音首字母的存储过程很值得收藏的数据库自定义函数


    /*
    declare @r nvarchar(4000)
    set @r=dbo.fun_getPY ('易天')
    print @r
    */
    Create  function fun_getPY
     (
        @str nvarchar(4000)
     )
    returns nvarchar(4000)
    as
    begin

      declare @word nchar(1),@PY nvarchar(4000)

      set @PY=''

      while len(@str)>0
      begin
        set @word=left(@str,1)

        --如果非汉字字符,返回原字符
        set @PY=@PY+(case when unicode(@word) between 19968 and 19968+20901
                   then ( 
                                select top 1 PY 
                                from 
                                ( 
                                 select 'A' as PY,N'驁' as word
                                 union all select 'B',N'簿'
                                 union all select 'C',N'錯'
                         union all select 'D',N'鵽'
                         union all select 'E',N'樲'
                         union all select 'F',N'鰒'
                         union all select 'G',N'腂'
                         union all select 'H',N'夻'
                         union all select 'J',N'攈'
                         union all select 'K',N'穒'
                         union all select 'L',N'鱳'
                         union all select 'M',N'旀'
                         union all select 'N',N'桛'
                         union all select 'O',N'漚'
                         union all select 'P',N'曝'
                         union all select 'Q',N'囕'
                         union all select 'R',N'鶸'
                         union all select 'S',N'蜶'
                         union all select 'T',N'籜'
                         union all select 'W',N'鶩'
                         union all select 'X',N'鑂'
                         union all select 'Y',N'韻'
                         union all select 'Z',N'咗'
                          ) T 
                       where word>=@word collate Chinese_PRC_CS_AS_KS_WS 
                       order by PY ASC
                              ) 
                          else @word 
                     end)
        set @str=right(@str,len(@str)-1)
      end

      return @PY

    end

     

     

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  • 原文地址:https://www.cnblogs.com/yitian/p/921419.html
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